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Buses replace late night trains in the Carmarthen / Swansea area from Monday 12 to Friday 16 January 

See all service disruptions

Engineering work details

Starts Monday 12 January 2026 to Friday 16 January 2026

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Train operators affected

Route(s) affected

Transport for Wales between Carmarthen and Swansea / Llandovery / Cardiff Central, and between Fishguard Harbour and Cardiff Central

Description

Engineering work is taking place between Carmarthen and Llanelli, closing various lines overnight.

As a result:

Monday to Thursday:

  • The 21:46 Fishguard Harbour to Cardiff Central service will be diverted, and will not call at stations via Swansea. A replacement bus will run from Llanelli to Port Talbot Parkway, calling at stations via Swansea

  • The 23:20 Cardiff Central to Carmarthen service will terminate at Llanelli. A replacement bus will run from Llanelli to Carmarthen

  • The 23:48 Swansea to Carmarthen service will be replaced by a bus throughout

Tuesday to Friday:

  • The 04:38 Carmarthen to Swansea will be replaced by a bus throughout

  • The 05:13 Swansea to Llandovery service will start from Llanelli at 05:29, an earlier replacement bus will run from Swansea to Llanelli, connecting with the train

Check before you travel:

You can plan your journey using the National Rail Enquiries Journey Planner

Replacement bus travel advice:

For helpful advice if you need to travel on a rail replacement service, including accessibility and bicycle information, please use our Rail Replacement Services page.

You can find the pick-up and set-down location of rail replacement services by checking station signage or by searching for your station on our Find a Station page.

Please be advised that replacement vehicles may be busier than usual, and you should allow extra time for your journey.

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